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Title: Coercivity of Sm{sub 2}Fe{sub 17}N{sub 3} particles prepared by mechanically grinding without exposing in air

Abstract

As a first step for clarifying coercivity mechanism in high-performance permanent magnet, the effect of particle size on coercivity in Sm{sub 2}Fe{sub 17}N{sub 3} was studied by mechanically grinding method without exposing in air. The coercivity increases with increasing the grinding time, reaches a maximum value of 1.23 T at grinding time for 60 min and gradually decreases beyond 90 min grinding. The resultant maximum energy product reaches up to 3298 kJ/m{sup 3} for 60 min grinding. However, the coercivity of 1.23 T is still too small compared with the anisotropy field, suggesting that the surface effect controls the coercive force in this system, rather than the size effect.

Authors:
; ; ;
Publication Date:
Research Org.:
Hiroshima Univ. (JP)
OSTI Identifier:
20000763
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)
Additional Journal Information:
Journal Volume: 35; Journal Issue: 5Pt2; Conference: 1999 international magnetics conference (Intermag '99), Kyongju (KR), 05/18/1999--05/21/1999; Other Information: PBD: Sep 1999; Journal ID: ISSN 0018-9464
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SAMARIUM NITRIDES; IRON NITRIDES; COERCIVE FORCE; FABRICATION; PERMANENT MAGNETS; MAGNETIC PROPERTIES

Citation Formats

Sasaki, I., Fujii, H., Okada, H., and Suzuki, S. Coercivity of Sm{sub 2}Fe{sub 17}N{sub 3} particles prepared by mechanically grinding without exposing in air. United States: N. p., 1999. Web. doi:10.1109/20.800511.
Sasaki, I., Fujii, H., Okada, H., & Suzuki, S. Coercivity of Sm{sub 2}Fe{sub 17}N{sub 3} particles prepared by mechanically grinding without exposing in air. United States. doi:10.1109/20.800511.
Sasaki, I., Fujii, H., Okada, H., and Suzuki, S. Wed . "Coercivity of Sm{sub 2}Fe{sub 17}N{sub 3} particles prepared by mechanically grinding without exposing in air". United States. doi:10.1109/20.800511.
@article{osti_20000763,
title = {Coercivity of Sm{sub 2}Fe{sub 17}N{sub 3} particles prepared by mechanically grinding without exposing in air},
author = {Sasaki, I. and Fujii, H. and Okada, H. and Suzuki, S.},
abstractNote = {As a first step for clarifying coercivity mechanism in high-performance permanent magnet, the effect of particle size on coercivity in Sm{sub 2}Fe{sub 17}N{sub 3} was studied by mechanically grinding method without exposing in air. The coercivity increases with increasing the grinding time, reaches a maximum value of 1.23 T at grinding time for 60 min and gradually decreases beyond 90 min grinding. The resultant maximum energy product reaches up to 3298 kJ/m{sup 3} for 60 min grinding. However, the coercivity of 1.23 T is still too small compared with the anisotropy field, suggesting that the surface effect controls the coercive force in this system, rather than the size effect.},
doi = {10.1109/20.800511},
journal = {IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)},
issn = {0018-9464},
number = 5Pt2,
volume = 35,
place = {United States},
year = {1999},
month = {9}
}